Intro:

Hey stupid heroes!Everything is terrible ! The Lair of All Goblins has been overrun by wicked things that dumb heroes like you always fight. You must come here, beat them up, and break their things to stop the unthinkable: the end of all goblins! You obviously don’t know where the lair of All Goblins is, so I drew a map. Don’t lose it!Your fearsome master,Splig

The map is rough but legible, leading to a place you clearly recognize as the Parigreth ruins. Having nothing better to do, you gather your gear and depart.